KR200199501Y1 - Piercing installation for forming of liquid crystal display film - Google Patents

Abstract

The present invention is a vertical fixing hole (36a) formed over two places of the upper surface, the upper holder 36 through which the horizontal fixing hole (36b) from each side so as to connect to each of the vertical fixing hole (36a); The cutting hole 42 is inserted into the vertical fixing hole 36a of the upper holder 36 and is widened and narrowed by shearing one side thereof, and is punched in a central portion so as to extend integrally with the cutting hole 42. A punch holder 40 in which a guide hole 44 is formed; A piercing punch 39 inserted into the punch guide hole 44 of the punch holder 40 to protrude downward; And a fixing bolt 39a which is inserted into the horizontal fixing hole 36b of the upper holder 36 and pushes one side of the punch holder 40 so that the piercing punch 39 of the punch guide hole 44 is fixed. When the piercing punch in the mold is worn out while repeating the mold operation of the film used for the liquid crystal display, the operator removes the fixing bolt, the punch holder and the piercing punch in sequence, and then wears the piercing punch. By cutting and repeatedly reusing parts, replacement of worn piercing punches is not repeated more than necessary, resulting in improved workability and reduced work costs.

Description

Piercing device of mold for forming LCD screen film {PIERCING INSTALLATION FOR FORMING OF LIQUID CRYSTAL DISPLAY FILM}

The present invention relates to a metal mold for forming a liquid crystal screen film, and more particularly, to a piercing device for a metal mold for forming a liquid crystal screen film that can be repeatedly used several times without being replaced even when the piercing punch is worn out.

Usually, a liquid crystal screen is produced by laminating a polarizing plate or a retardation plate on both sides of a liquid crystal cell in which liquid crystal is sealed between two substrates. In addition, various films are adhered to the surface of the polarizing plate or the retardation plate in order to prevent abrasion and dust adhesion on the surface of the polarizing plate or the retardation plate in distribution processes or assembling various display devices such as computers, word processors and televisions. After such a film plays a protective role of a polarizing plate or a retardation plate, it peels away as an unnecessary thing. The film is formed of a wear resistant layer, an adhesive layer, and a release film in that order.

In a conventional mold for producing a film, a pair of vertical members is erected on top of the base plate. The lower holder is placed on the upper part of the vertical member. The blanking punch is integrally projected on the upper part of the lower holder. The stripper protrudes from the upper surface of the lower holder and is inserted into and out of the blanking punch.

As shown in FIG. 4, the pad 104 is coupled to the back surface of the upper holder 100 together with the blanking die 102. The upper holder 100 penetrates through two places so that the vertical fixing hole 100a and the horizontal fixing hole 100b communicate with each other. A piercing punch 106 is fitted into the vertical fixing hole 100a to partially protrude into the blanking hole 102a of the blanking die 102. The blanking hole 102a is formed in the blanking die 102 so that the pad 104 is fitted.

In the forming operation of the film using the conventional mold configured as described above, the upper holder is lowered by a press device (not shown), so that the blanking punch (not shown) passes through the blanking hole 102a of the blanking die 102 and has an upper pad. In contact with 104, blanking of the film (not shown) is performed. At this time, the piercing punch 106 is pierced through one side of the blanking-formed film. When the piercing punch 106 is pierced in such a repetitive process, the tip of the piercing punch 106 hits the surfaces of the film and the blanking punch, causing wear. The worn piercing punch 106 was not able to perform the piercing work required for the film, and for this purpose, the piercing punch 106 had to be replaced with new ones, resulting in a problem of cost increase and workability deterioration.

The technical problem of the present invention is to provide a piercing apparatus for a mold for forming a liquid crystal screen film, which can be repeatedly used several times even if the piercing punch is worn out during a piercing punching operation.

The present invention is a vertical fixing hole formed over two places of the upper surface, the upper holder through which the horizontal fixing hole from each side so as to pass through each vertical fixing hole respectively; A punch holder inserted into a vertical fixing hole of the upper holder and having a cutting hole widened and narrowed by shearing one side thereof, and a punch guide hole formed at a central portion thereof so as to extend integrally with the cutting hole; A piercing punch inserted into the punch guide hole of the punch holder and having a tip protruding downward; And a fixing bolt which is inserted into the horizontal fixing hole of the upper holder to move forward and presses one side of the punch holder to fix the piercing punch of the punch guide hole.

1 is an overall perspective view showing a mold for forming a LCD screen film according to an embodiment of the present invention;

2 is an exploded perspective view of a pad, a blanking die and a piercing device from an upper holder of a mold according to an embodiment of the present invention;

Figure 3 is an enlarged cross-sectional view showing the main portion showing the installation state of the piercing device according to an embodiment of the present invention; And

Figure 4 is an enlarged cross-sectional view of the main portion showing the installation state of the piercing device in the prior art.

* Description of the symbols for the main parts of the drawings *

M: Mold 10: Base Plate

12: vertical member 20: lower holder

22: blanking punch 30: stripper

32: spacer block 34: blanking die

34a: blanking hole 36: upper holder

36a: vertical fixing hole 36b: horizontal fixing hole

38: Pad 39: Piercing Punch

39a: fixing bolt 40: punch holder

42: incision 44: punch guide

50: first guide 52: second guide

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall perspective view of a mold for forming a liquid crystal display film (not shown) denoted by the symbol 'M'. 2 is an exploded perspective view of the pad 38, the blanking die 34 and the piercing device from the upper holder 36.

As shown therein, the piercing apparatus of the mold for forming a liquid crystal display film is installed in the upper holder 36 including the punch holder 40 and the piercing punch 39.

On the upper surface of the upper holder 36, vertical fixing holes 36a are formed in two places. One side surface of the upper holder 36 penetrates the horizontal fixing hole 36b so as to communicate with each of the vertical fixing holes 36a. The punch holder 40 is fitted in the vertical fixing hole 36a.

The punch holder 40 is preferably formed to have a vertical cross section, but is preferably manufactured in various forms such as a pentagon. The vertical fixing hole 36a is produced in the same shape as the punch holder 40. The punch guide hole 44 is vertically penetrated in the center of the punch holder 40. One side of the punch holder 40 is formed with a cutting hole 42 to communicate with the punch guide hole 44.

The piercing punch 39 is fitted into the punch guide hole 44 of the punch holder 40 to protrude downward. The piercing punch 39 is formed in a circular or elliptical longitudinal section. Likewise, the punch guide hole 44 is formed in a circular or elliptical shape.

The fixing bolt 39a is fitted into the horizontal fixing hole 36b of the upper holder 36 so that the tip contacts one side of the punch holder 40.

The piercing punch 39 is inserted into the punch guide hole 44 of the punch holder 40, and then the fixing bolt 39a is inserted into the horizontal fixing hole 36b of the upper holder 36 to move forward. Then, the tip of the fixing bolt (39a) pushes one side of the punch holder 40 so that the incision hole is narrowed. As a result, the piercing punch 39 inserted in the punch holder 40 is firmly fixed.

For reference, the lower holder 20 is mounted on the upper part of the base plate 10 together with the plurality of vertical members 12, and the stripper 30, the spacer block 32, and the blanking part are disposed on the upper part of the lower holder 20. The die 34 and the upper holder 36 are raised in sequence.

The overall operation of the mold of the present invention configured as described above is as follows.

A piercing punch 39 is inserted into the punch guide hole 44 of the punch holder 40, and the punch holder 40 into which the piercing punch 39 is fitted is fitted into the vertical fixing hole 36a of the upper holder 36. . Subsequently, the fixing bolt 39a is inserted into the horizontal fixing hole 36b of the upper holder 36 so that the tip thereof pushes one side of the upper holder 36. Accordingly, the punch guide hole 44 is narrowed together with the cut-out hole 42 of the upper holder 36, thereby firmly fixing the piercing punch 39 located in the punch guide hole 44.

In this state, the base plate 10 is fixed by placing a mold M1 for forming a liquid crystal screen film on a normal press device (not shown). The raw material of the film is made to flow into the space between the blanking die 34 and the stripper 30 of the metal mold | die M1.

As shown in FIG. 3, when the upper holder 36 is pressed and lowered in accordance with the operation of the press device, the blanking die 34 and the stripper 30 are lowered together with the upper holder 36 to lower each return spring (not shown). In the pressed state, the blanking punch 22 fitted into the stripper 30 is inserted into the blanking hole 34a of the blanking die 34 to perform blanking molding of the raw material. At the same time, the piercing punch 39 protruding to the bottom of the pad 38 is pierced in the blanking-formed film, respectively. The film is lowered through the stripper 30 by a pad 38 provided on the back surface of the upper holder 36. The blanking-molded raw material is discharged through the other space of the blanking die 34 and the stripper 30. The first guides 50 are simultaneously lowered with the lowering of the upper holder 36, and the second guide 52 is guided by the stripper 30 and the blanking die 34 fitted thereto. When the pressing force applied to the upper holder 36 is removed and made free, the upper holder 36 together with the blanking die 34 and the stripper 30 is raised by the restoring force of each of the compressed return springs 40c. As a result, the blanking die 34 is raised to retreat from the blanking punch 22 located in the blanking hole 34a. Inflow and outflow of these raw materials, blanking and piercing molding of the film are performed repeatedly.

In this process, the piercing punch 39 is worn out by repeated piercing of the film. Thereby, the worker removes the fixing bolt 39a from the horizontal fixing hole 36b, and removes the punch holder 40 which was fitted to the vertical fixing hole 36a. The piercing punch 39 is then removed from the punch holder 40 to remove the worn portion. The piercing punch 39 in which the removal operation is completed is inserted into the punch guide hole 44 of the punch holder 40. The punch holder 40 is fitted into the vertical fixing hole 36a of the upper holder 36. The fixing bolt 39a is inserted into the horizontal fixing hole 36b of the upper holder 36 to move forward. Then, the tip of the fixing bolt (39a) is pressed to one side of the punch holder 40 to fix the piercing punch (39) does not fall out to perform a piercing operation. As a result, the piercing operation is repeatedly performed several times while removing the worn portion of the piercing punch 39 as described above. Then, when the length of the piercing punch 39 becomes shorter than necessary, the piercing punch 39 is replaced with a new one. Replace it with one.

As described in detail above, according to the piercing apparatus of the mold for forming a liquid crystal display film, when the piercing punch in the mold is worn out while repeating the mold operation of the film used for the liquid crystal screen, the worker has fixed bolts, punch holders, and piercings. After the punches are removed in turn, the worn parts of the piercing punches are cut and reused repeatedly so that replacement of the worn piercing punches is not repeated more than necessary, thereby improving workability and reducing work costs.

Although the present invention has been described in detail only with respect to the embodiments described above, it will be apparent to those skilled in the art that changes or modifications can be made within the spirit and scope of the present invention, and such changes or modifications are attached to the accompanying drawings. It should be limited by the utility model registration claim.

Claims (1)

A vertical holder 36a formed over two places on the upper surface, and an upper holder 36 through which the horizontal fixing hole 36b penetrates from one side thereof so as to communicate with each of the vertical fixing holes 36a; The cutting hole 42 is inserted into the vertical fixing hole 36a of the upper holder 36 and is widened and narrowed by shearing one side thereof, and is punched in a central portion so as to extend integrally with the cutting hole 42. A punch holder 40 in which a guide hole 44 is formed; A piercing punch 39 inserted into the punch guide hole 44 of the punch holder 40 to protrude downward; And Fixing bolt 39a which is inserted into the horizontal fixing hole 36b of the upper holder 36 and pushes one side of the punch holder 40 so that the piercing punch 39 of the punch guide hole 44 is fixed. Piercing device of the mold for forming a liquid crystal screen film, characterized in that it comprises a.